Yazar "Entok, Emre" seçeneğine göre listele
Listeleniyor 1 - 4 / 4
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Posttreatment effects of olea europaea L. Leaf extract on carbon tetrachloride-Induced liver injury and oxidative Stress in rats(Mary Ann Liebert, 2018) Üstüner, Derya; Çolak, Emine; Dinçer, Murat; Tekin, Neslihan; Dönmez, Dilek Burukoğlu; Akyüz, Fahrettin; Çolak, Ertuğrul; Kolaç, Umut Kerem; Entok, Emre; Üstüner, Mehmet CengizThe aim of this study is to examine the therapeutic effects of Olea europaea L. leaf extract on carbon tetrachloride (CCl4)-induced liver damage in rats. In the experiments, 3- to 4-month-old 28 male Sprague-Dawley rats were divided into four groups: control, O. europaea leaf extract, CCl4, and curative. The CCl4 and curative groups received CCl4 (0.2mL/kg) intraperitoneally for 10 days to form hepatic injury. O. europaea (80mg/kg) leaf extract was given orally to the curative group dissolved in distilled water the following 14 days. Hepatic and antioxidant enzyme levels, p53, caspase 3, lipid peroxidation marker malondialdehyde (MDA), and also DNA fragmentation levels were determined to establish oxidative stress in hepatic cell damage and its consequences. After formation of liver damage, oral administration of the O. europaea significantly reduced CCl4-induced elevations of serum alkaline phosphatase, aspartate aminotransferase and alanine aminotransferase levels (P<.001), MDA levels of both blood (P<.001) and liver tissues (P<.001), DNA fragmentation (P<.001), p53 (P<.001), and caspase 3 (P<.001) levels of liver tissues. Also this administration in curative group significantly increased CCl4-induced reductions of superoxide dismutase (SOD) (P<.001) and catalase (CAT) (P<.001) activity of blood samples and decreased SOD (P<.001) and CAT (P<.05) activity observed in liver tissue curative groups compared with CCl4 curative group. In CCl4 group, liver tissue samples exhibited remarkable damage because of CCl4 and reduction of these damages were observed in the curative group. Our results showed that O. europaea leaf extract was effective in reducing hepatic damage caused by CCl4 by reducing lipid peroxidation, regulating antioxidant enzymes, and minimizing DNA damage.Öğe Propolis protects endotoxin induced acute lung and liver inflammation through attenuating inflammatory responses and oxidative stress(Mary Ann Liebert, 2018) Yangi, Berat; Üstüner, Mehmet Cengiz; Dinçer, Murat; Özbayer, Cansu; Tekin, Neslihan; Üstüner, Derya; Çolak, Emine; Kolaç, Umut Kerem; Entok, EmrePropolis is a natural bee product, and it has many effects, including antioxidant, anti-inflammatory, antihepatotoxic, and anticancer activity. In this study, we aimed to explore the potential in vivo anti-inflammatory, antioxidant, and antiapoptotic properties of propolis extract on lipopolysaccharide (LPS)-induced inflammation in rats. Forty-two, 3- to 4-month-old male Sprague Dawley rats were used in six groups. LPS (1mg/kg) was administered intraperitoneally to rats in inflammation, inflammation + propolis30, and inflammation+propolis90 groups. Thirty milligram/kilogram and 90mg/kg of propolis were given orally 24 h after LPS injection. After the determination of the inflammation in lung and liver tissues by F-18-fluoro-deoxy-d-glucose-positron emission tomography ((18)FDG-PET), samples were collected. The levels of malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT), nitric oxide (NO), and DNA fragmentation were determined. The decrease of MDA levels in inflammation + propolis30 and inflammation + propolis90 groups was determined compared to the inflammation group in lung and liver tissues. The increase of SOD% inhibition in inflammation + propolis90 group was determined in liver, lung, and hemolysate compared to the inflammation group. Increased CAT activities in inflammation + propolis30 and inflammation + propolis90 groups were observed in liver tissue and hemolysate compared to inflammation group. In lung tissue, NO levels were lower in inflammation group compared to the control group, but DNA fragmentation levels were higher. F-18-FDG uptake of tissues in inflammation + propolis30 and inflammation + propolis90 groups was decreased compared to the inflammation group. In conclusion, the data of this study indicate that the propolis application may serve as a potential approach for treating inflammatory diseases through the effect of reducing inflammation and free oxygen radical production.Öğe The anti-inflammatory and antioxidant effects of salvia officinalis on lipopolysaccharide-induced inflammation in rats(Mary Ann Liebert, Inc, 2017) Kolaç, Umut Kerem; Üstüner, Mehmet Cengiz; Tekin, Neslihan; Üstüner, Derya; Çolak, Emine; Entok, EmreSalvia officinalis, which has a high phenolic acid and flavonoid content, is a powerful antioxidant and anti-inflammatory herb. Inflammation plays an important role in the pathophysiology of many diseases and could cause damage by means of oxidative stress. The aim of this study was to investigate the anti-inflammatory and antioxidant activity of S. officinalis formed lipopolysaccharide (LPS)-induced experimental inflammation model. Four- to five-month-old 42 female Wistar albino rats were divided into six groups. Three groups were administered intraperitoneally 1mg/kg LPS. Twenty-four hours after injection of LPS, 10 and 30mg/kg S. officinalis extract were given orally to treatment groups. Pulmonary and hepatic F-18-fluoro-deoxy-D-glucose (F-18-FDG) uptake was calculated to determine the status of inflammation by 18F-fluoro-deoxy-D-glucose-positron emission tomography ((18)FDG-PET) scan. Antioxidant enzyme activities and nitric oxide (NO) and malondialdehyde (MDA) levels were determined. Nuclear factor-kappa B (NF-B) and tumor necrosis factor-alpha (TNF-) levels were also detected in serum. As a result, lung and liver F-18-FDG uptake was found to be higher in the inflammation group than control group. MDA levels in erythrocyte and all tissue samples (liver, lung, and kidney) were found to be significantly higher compared to treatment groups. Superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase activities of the inflammation group in the liver, lung, kidney tissues, and erythrocyte SOD and CAT activities were determined to significantly lower than groups treated with S. officinalis. Increased NO, NF-B, and TNF- levels were found in the inflammation group. S. officinalis has been observed to have useful effects on LPS-induced inflammation and oxidative stress in rats.Öğe The effects of S-Allyl cysteıne on inflammatory cascade in lipopolysaccharide induced rat sepsis model(Eskişehir Osmangazi Üniversitesi, 2021) Tekin, Neslihan; Kolaç, Umut Kerem; Tanrıkut, Cihan; Üstüner, M. Cengiz; Entok, Emre; Akyüz, Fahrettin; Alataş, İbrahim ÖzkanLipopolysaccharide (LPS) is a main constituent of Gram-negative bacterial cell walls and is considered a leading cause of sepsis. S-allyl cysteine (SAC) is a water-soluble organosulfur component present in garlic which has a potent antioxidant and free radical scavenger activity. The purpose of this study is to examine the antioxidant and anti-inflammatory potential of SAC on endotoxin LPS-induced sepsis. Female Wistar albino rats were divided into 6 groups. LPS (5 mg/kg) was applied to rats in sepsis and treatment groups intraperitoneally. After 24 hours from LPS injection 50 mg/kg and 100 mg/kg SAC was orally administrated to treatment groups. Lung and liver 18F-fluoro-deoxy-D-glucose (18F-FDG) uptake was measured by 18FDG-PET scan. Serum levels of nuclear factor-kappa B (NF-??), tumor necrosis factor-alpha (TNF-?), matrix metalloproteinase-9 (MMP-9), plasma levels of interleukin-1? (IL-1?), IL-6 and tissue levels of oxidative stress markers catalase (CAT), superoxide dismutase (SOD), malondialdehyde (MDA) and nitric oxide (NO) were determined. As a result of the study, MDA and NO levels of sepsis group were significantly higher than treatment groups in lung tissue. SOD activities of sepsis group was determined to significantly lower in the liver and lung tissues than the groups which were treated with SAC. Likewise, it was concluded that serum MMP-9, TNF-? and NF-?? levels of sepsis group was significantly higher compared to levels of treatment groups. It was determined that SAC administration reduced 18F-FDG uptake in septic rats. In conclusion, SAC was observed to diminish effects of the acute toxicity and oxidative stress formed with LPS.
